TeleGeography: Ethernet VPLS, EoDWDM interest grows, while IP/VPN expansion dips
HISTORICAL SPACE FREQUENCIES. The first satellite to orbit the Earth was Sputnik 1, launched by the Soviets in October 1957. It carried two radio beacons on frequencies of 20.005 and 40.01 MHz. The Soviets continued to use frequencies around 20 MHz and even some around 15 MHz for many subsequent missions. This tends to be used for uplinks of the satellites that downlink in the 137 - 138 MHz band. 2  149.95 - 150.05 MHz. 3  This is used by satellites providing positioning, time and frequency services, by ionospheric research and other satellites.
The satellite is moving much faster than the earth's surface, though, because it must cover much more distance in the same amount of time. A geosynchronous satellite is moving at about 3.07 km/sec. Lower orbits are much faster.The space shuttle at 300km is moving at more like 7.73 km/sec. For comparison, the earth's surface at the equator moves at a leisurely 0.46 km/sec. To obtain a circular orbit of this velocity around earth, you would need to be at an altitude of around 1.6 million km. geosynchronous satellite is moving at about 3.07 km/sec. Lower orbits are much faster. The space shuttle at 300km is moving at more like 7.73 km/sec. For comparison, the earth's surface at the equator moves at a leisurely 0.46 km/sec.